Site of Photosynthesis

Large SA for max sunlight;Branched leaves so no overlapping/shadowing;Thin so short diff pathway;Transparent cuticle to let light through to PS cells (mesophyll);Long narrow palisade cells with numerous chloroplasts to collect sunlight;Numerous stomata for gas exchange;Stomata that open/close to respond to varying light intensities;Many air spaces in lower mesophyll layer for diffusion of O2& CO2;Network of xylem to bring water to leaf & phloem to carry sugars away